Lawn-mower.



PATENTBD JUNE 4, 1907.

C. G. OMAN.

LWN MOWER.

ArPLIoATIoN FILED Nov. ze, 1905.

2 SHEETS-SHEET 1.

wi nenes PATENTED JUNE 4, 1907. G. G. OMAN.

LAWN MOWER.

APPLIOATION HLM) Nov. 28, 1905.

2 SHEETS-SHEET z.

UNITED STATES PATENT oEEroE,

CHARLES G. OMAN, OF JONESORO, INDIANA.

LAWN-IVIOWER..

ASpecification of Letters Patent.

Patented June 4, 1907i Application filed November 28, 1905. Serial No.289.393.

This invention relates to mowing .ma-

chines.

One object is to provide a comparatively simple, inexpensive, durable,efficient and easily operated machine particularly designed for thecutting of lawn grass.

Another object resides in the provision of a hand mower embodying suchcharacteristics that it will be light and positive in operation.

lith these and other objects in view, the present invention consists inthe combination and arrangement of parts as will be hereinafter morefully described, shown in the accompanying drawings and particularlypointed out in the appended claims.

In the drawings: Figure 1 is a rear'view of a mower illustrating one ofthe ground wheels and other portions in section. Fig. 2 is a top planview. Fig. 8 is a .transverse sectional view through the cutter barsupport and the overlapping cutter bars. Fig. 4 is a detail view of oneof the eccentrics and the pitman mounted thereupon.

Referring now more particularly to the accompanying drawings, thereference characters 1 and 2 indicate ground wheels provided with atread flange 8 and an outwardly extending bulging portion 4 within itsperiphery in the center of which bulging portion is disposed theinwardly directed bearing sleeve 5 designed to engage the stub shaft 6of the disk 7 forming the inner side of each wheel and to permit ofrotation of the ground wheels. A fastening pin 8 is designed to preventaccidental disengagement of the ground wheels from the respective stubshaft 6. It will be observed that the stub shafts 6 are formed byreducing the outer ends of a boss 9 formed upon the inner face of thedisk 7 and that the enlarged portion of each boss is rol vided with aperforation 10 arranged in a inement with the perforation 11 in each ofthe upper and lower bosses 12 and 13 of the vdisk 7. These bosses 9, 12and 13 have a shaft 14 rotatably mounted through their perforations. Theupper end of each shaft 14 is provided with a pinion515''designed tomesh with the circularllftoothedrackjl 6 formed upon the inner faceof'each ground wheel intermediate the tread surface 3 and the peripheryof the bulging portion lower end of each shaft 14 has an eccentric 17iixedly mounted thereupon-beneath the lower boss 13 and this eccentric17 is designed to o erate inwardly and outwardly in the ho ow formed bythe wheel proper and the disk 7 through an opening 18. These disks 7 ofthe ground wheels are connected together by means of a suitable tie rod19 so that the disks will remain stationary while the ground wheelsrevolve.

.A cutter bar support 2O is mounted between the disks 7 of the groundwheels.- It

vwill be observed that this cutter bar support 20 has a groove 21 in itsupper face extending longitudinally throughout its length and that eachend of the cutter bar support 20 has a U-shaped bracket 22 extending ata right angle thereto so that the cutter support may be Supportedbetween the disk 7 by reason of suitable pins 23 passed through thevlegs of the brackets 22 and engagedin a pair of lugs 24 of each disk 7.The cutter bar 25 is mounted directly above the cutter bar 26 and itwill be seen that these cutter bars cooperate With each other, and passeach other in opposite directions according to the movement impartedthereto in the manner hereinafter described.

The cutter bars 25 and 26 operate in a longitudinal groove 21 of thecutter bar support 20 and are held fromdisplacement through theinstrumentality of suitable clamps or plates 27 secured to the cutterbar support in any suitable manner and overlapping the rear edges of thecutter bars. Each cutter bar is provided with a lug 28 directedrearwardly thereof and provided with a perforation 29 for the engagementtherein of a wrist pin 30 which passes also through the correspondingpitrnan 31 arranged at one end of each of the cutter bars and connectedby means of a suitable bolt 32 to the corresponding aforesaid eccentrics17. It will be seen that the cutter bars are connected to pitmen atopposite ends for engagement with the corresponding sprockets and thatobviously when the eccentrics are operated the pitmen operate in suchdirection as to cause the overlapping cutter bars to operate in theoproov TIO

posite directions and thereby cut the grass through the overlapping ofthe toothed edges 33 of the cutter bars. It will also be seen that eachcutter bar passes through a slot a of the corresponding disks 7 intoclose proximity with the circular racks of the corresponding groundWheels.

From the foregoing, it will be seen that my improved mowingmachine isexceedingly simple in construction and that by reason of thedisks andground Wheels bein connected together in the manner stated, ho lowground Wheels are provided to protect the operating mechanism arrangedwithin the respective Wheels.

What is claimed is:

A mowing machine comprising ground Wheels each having a central inwardlydirected integral bearing sleeve and an annular rack formed on its innerface; adisk carried by each ground wheel and provided with a verticalseries of bosses formed on its inner face and havin alining openings,the central boss of eac disk having a reduced eX- tended end ada ted tobe received in the bearing sleeve o the adjacent ground Wheel, to serveas the axle for the latter; a vertically disposed shaft mounted in theopenings of each series of bosses; a pinion secured to the upper end ofeach shaft for operative engagement with the 'adjacent rack; aneccentric secured to the lower end of each'shaft, said eccentrics beingoppositely disposed with respect to each other; a tie rod connectingsaid disks to hold the same stationary; a cutterbar support disposedtransversely between said disks and connected therewith, said supporthaving a longitudinal slot formed therein; a pair of cutter bars mountedupon said support one above the other, each cutter bar having a lug atone end for engagement with the correspond ing eccentric, whereby thecutter bars may be reciprocated in opposite directions upon rotationofthe ground wheels and clamps secured to said support and eX- tendingforwardly over the cutter bars, to prevent displacement of the latter.

Intestimony whereof, I aliX my signature, in presence of two witnesses.

CHARLES' G. OMAN.

